261158768222 has 16 divisors (see below), whose sum is σ = 428809257072. Its totient is φ = 118303379520.

The previous prime is 261158768209. The next prime is 261158768341. The reversal of 261158768222 is 222867851162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20250983 + ... + 20263874.

It is an arithmetic number, because the mean of its divisors is an integer number (26800578567).

Almost surely, 2^261158768222 is an apocalyptic number.

261158768222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261158768222 is a deficient number, since it is larger than the sum of its proper divisors (167650488850).

261158768222 is a wasteful number, since it uses less digits than its factorization.

261158768222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40515163.

The product of its digits is 1290240, while the sum is 50.

The spelling of 261158768222 in words is "two hundred sixty-one billion, one hundred fifty-eight million, seven hundred sixty-eight thousand, two hundred twenty-two".